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Old 06-22-09, 04:03 PM
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Stuck chain with EEB

The chain of my Dahon Cadenza 8 came off the chainwheel and got stuck. It was completely inoperable by the roadside so I had to wheel it the final 1 mile home.
The problem is one which many Eccentric Bottom Bracket users should beware. Usually a derailled chain will rest on the standard BB shell and can be re-railled using the front mech and some judicious pedalling.
The EEB has a wider diameter so there is room for the chain to slip between the edge of the shell and the chainset.
Matters are compounded by the Truvativ Isoflow single chainset which uses the same forging as the triple but with the inner bolt holes left un-machined. These small protrusions trap the chain and the only release is to remove the chainset.
Whilst I had the chainset off, I took a file to these small bits of metal, hopefully there is now an escape path for the chain.

If you have an EBB and a chainset with protruding bits you might want to consider filing them down. Take care not to nick the main crank with the file.
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